Weeding:-

Use the CREW method:-
Texas State CREW weeding guidelines

Continuous
Review
Evaluation
Weeding

An Interesting article on weeding
http://www.libraryjournal.com/article/CA6705360.html

An Australian perspective
http://www2.curriculum.edu.au/scis/connections/issue_63/secret_library_business__part_2.html

A wealth of resources on this website
Western Massachusetts Regional Library System
Weeding the Library Collection
http://www.wmrls.org/services/colldev/weeding.html

Weed of the month
This site is run by SUNLINK and has a number of articles on Weeds of the Month - according to Dewey number and has a number of tips for specific sections on criteria you should weed under. This is no longer being updated but you can access the archives.
http://www.heinemannlibrary.com/topic_archive/Weed

A quick list of general criteria to consider
from Inter-Lace http://members.ozemail.com.au/~slacey/tl_info3.htm#Stocktake%20Tips
1. Physical condition
  • torn and generally ragged
  • scratched and worn out
  • age tanned (brown around the edges and inside)
  • damaged beyond repair, through vandalism, accident or use
2. Content and form
  • inaccurate, biased and/or misleading information
  • dated or obsolete formats
  • stereotyping of race, culture or sex role
  • irrelevance to the curriculum and current teaching and learning methods
  • inappropriateness or irrelevant to the needs and interests of users
3. Use patterns
  • declining because interest has waned in something which was popular
  • non-existent
  • declining because materials were acquired to meet specific needs which
  • no longer exist
4. Lost
  • missing while on loan to a teacher
  • missing while on loan to a student who left the school
  • lost by a student still enrolled - paid for
  • lost by a student still enrolled - not paid for